| User | Post |
|
April 21, 2011
|
PrairieDog
| | |
| Lifetime Member | posts 15 | |
|
|
An electrical problem… my weakest point. (Although my wife suggests there are several.) 2007 JM 284.
Immediately after engine startup the ammeter will swing +/- 10 or 15 amps, at about once per second. The aftermarket voltmeter also swings about +/- 1 or 2 volts, same frequency. If I put a load on it (headlights) things steady out. And after some time, like 10-15 minutes, things seem to settle down. That would propbably correspond to the battery having been fully recharged.
I have looked for loose connections but found none. So, I'm almost at the point of starting down the expensive road…. changing parts. Alternator, regulator, keyswitch…where to look? Any suggestions re testing I should do?
Thanks,
Mike
|
|
|
April 21, 2011
|
Bob Rooks
| | |
| Lifetime Member Platinum Elite | posts 868 | |
|
|
The symptoms you describe have EPA written all over them, could be one of two things: 1) You have an air heater in your intake manifold (cycles on and off) and it keeps intake air warm until the engine warms up (Ford 7.3 diesels used this too). 2) If you are equipped with an EGR valve on your exhaust manifold, that serves the same purpose and acts the same way but is actuated by a solenoid.
|
|
|
April 22, 2011
|
PrairieDog
| | |
| Lifetime Member | posts 15 | |
|
|
Thanks for the reply, Bob, but I have neither. I failed to mention that this problem only started about 2 months ago; about 550 hours on the tractor.
Mike
|
|
|
April 22, 2011
|
Carl Darnell
| | |
| Lifetime Member | posts 68 | |
|
|
It could be the regulator causing the fluctuations. I wouldn't worry to much about it until it fails to charge.
It could also be the alternator but as long as it is charging leave it alone.
|
|
|
April 22, 2011
|
Tinbender
| | |
| Lifetime Member Elite | posts 385 | |
|
|
I'm thinking perhaps a bad diode in the alternators rectifier circuit .
Do a google search for "Alternator rectifier testing"
|
|
|
April 22, 2011
|
Tinbender
| | |
| Lifetime Member Elite | posts 385 | |
|
|
Maybe it's just a loose belt?
|
|
|
April 22, 2011
|
Bob Rooks
| | |
| Lifetime Member Platinum Elite | posts 868 | |
|
|
I've seen voltage regulators pulse like that before, but never back into discharge. Something is going to ground. Loose belt won't cause discharge unless there already is an electrical load it's trying to overcome. Bear in mind that you have only a ~14 amp alternator to begin with. If you checked all of the wiring connections and found them sound, then my bet would be on the voltage regulator.
|
|
|
April 22, 2011
|
Affordable
| | |
| Supporting Dealer | posts 195 | |
|
|
I have seen alot of voltage regulators on the Jinmas cause this same problem,not seeing your tractor to confirm it,but I think thats going to be your problem too
Tommy
Affordable Tractor Sales
"Your Jinma Parts Superstore"
** you don't have permission to see this link **
|
|
|
April 23, 2011
|
PrairieDog
| | |
| Lifetime Member | posts 15 | |
|
|
Thanks for the replies, folks. I'll focus on the regulator and report when I find what it is.
Mike
|
|
|
April 25, 2011
|
rschnier
| | |
| Lifetime Member | posts 3 | |
|
|
I had a somewhat-similar issue on my Jinma 454. After replacing the voltage regulator and seeing no difference, the problem turned out to be that the regulator was being loosened in its socket by engine vibrations (especially at low RPM). I cured the problem by putting a zip-tie around the regulator and its socket to firmly hold it in place.
Cheap and easy fix; just in case this turns out to be the issue.
- Randy
|
|
Search 
Home
Print this Topic 
Add a New Topic
Topic RSS 
Recent Comments